About the Author Len McMaster, a retired NASA employee, has collected stamps since 1950, concentrating on the US 1898 one-cent green Franklin since 1980. His collection/ study includes not only early use, but also production, revenue as well as postal use, US possessions and territorial use, and precancels. He has published more than 20 articles on "his" stamp. In addition McMaster edits the United States Possessions Philatelic Society journal, Possessions.
*** Moved by Staff to a more appropriate forum. ***
wkusau: I've been a member of that sites for several years, never noticed this particular paper from April 2015 before. Interesting piece about finding a cover that predates the cover previously used to establish EDU, by two days: 1/29/1989 instead of 1/31/1989. Also discusses a Post Master's note as evidence supporting a change in the first date of sale: 1/25/1989 in stead of 1/17/1898.